CN218813244U - Two-component assembled box culvert for top plate cast-in-place belt bottom-die-free construction - Google Patents
Two-component assembled box culvert for top plate cast-in-place belt bottom-die-free construction Download PDFInfo
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- CN218813244U CN218813244U CN202222494466.4U CN202222494466U CN218813244U CN 218813244 U CN218813244 U CN 218813244U CN 202222494466 U CN202222494466 U CN 202222494466U CN 218813244 U CN218813244 U CN 218813244U
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Abstract
The utility model relates to the technical field of bridge engineering, in particular to a two-component assembled box culvert constructed by a roof cast-in-place belt free bottom die, wherein the cast-in-place belt bottom die comprises a first step structure, a second step structure and leakage-proof reinforcing steel bars, the first step structure is positioned at the butt joint surface of a first prefabricated box culvert component, the second step structure is positioned at the butt joint surface of a second prefabricated box culvert component, the first step structure and the second step structure form a groove, and the leakage-proof reinforcing steel bars are positioned inside the groove; the cast-in-place strip bottom mould is used for pouring a cast-in-place strip at the top, and a plurality of reinforcing steel bars which are transversely arranged in a staggered mode are arranged in the cast-in-place strip at the top. The utility model discloses the recess structure of butt joint face department formation improves the power effect of biography of the cast-in-place area in top, constructs through first step and second step and forms closed bottom plate, reduces the construction complexity for site operation speed is a quick and reliable technical means who connects two component formula prefabricated box culvert.
Description
Technical Field
The utility model relates to a bridge engineering technical field specifically is a two component assembled box culvert of die block construction are exempted from in cast-in-place area of roof.
Background
The two-component assembly type reinforced concrete box culvert has few prefabricated components and is simple and convenient to assemble, but the cast-in-place section is arranged in the middle of the top plate and the bottom plate and is a position which is unfavorable for the maximum positive bending moment of the top plate and the bottom plate and is stressed, cracks are easy to generate under the action of the bending moment, and in order to be convenient to prefabricate a vertical mold, cast-in-place embedded steel bars are usually straight bars which are welded and connected on site, so that the fatigue problem is easy to generate; the construction of the cast-in-place section of the top plate needs to be provided with a suspended formwork or a support erecting formwork in the box culvert, so that the construction difficulty and complexity are increased.
SUMMERY OF THE UTILITY MODEL
There is the great problem of the cast-in-place section construction degree of difficulty of roof among the prior art, the utility model provides a two component assembled box culverts of die block construction are exempted from in cast-in-place area of roof.
The utility model discloses a realize through following technical scheme:
a two-component assembly type box culvert with a top plate cast-in-place strip and free of bottom die construction comprises a first prefabricated box culvert component and a second prefabricated box culvert component which are arranged at an interval, wherein a top notch is formed at the joint surface of the first prefabricated box culvert component and the second prefabricated box culvert component, a cast-in-place strip bottom die is arranged at the position of the top notch, the cast-in-place strip bottom die comprises a first step structure, a second step structure and leakage-proof steel bars, the first step structure is located at the joint surface of the first prefabricated box culvert component, the second step structure is located at the joint surface of the second prefabricated box culvert component, the first step structure and the second step structure form a groove, and the leakage-proof steel bars are located inside the groove; the cast-in-place strip bottom mould is used for pouring a cast-in-place strip at the top, and a plurality of reinforcing steel bars which are transversely arranged in a staggered mode are arranged in the cast-in-place strip at the top.
Preferably, the groove is V-shaped.
Preferably, the thickness of the first step structure is 1/3-1/4 of the thickness of the top plate of the first prefabricated box culvert component.
Preferably, the thickness of the second step structure is 1/3-1/4 of the thickness of the top plate of the second prefabricated box culvert component.
Preferably, the reinforcing steel bars comprise a plurality of first reinforcing steel bars, a plurality of second reinforcing steel bars and a plurality of connecting reinforcing steel bars, one end of each first reinforcing steel bar is embedded in the top plate of the first prefabricated box culvert component, and the other end of each first reinforcing steel bar extends out of the top plate of the first prefabricated box culvert component; one end of the second steel bar is embedded in the top plate of the second prefabricated box culvert component, and the other end of the second steel bar extends out of the top plate of the second prefabricated box culvert component; the first reinforcing steel bars, the second reinforcing steel bars and the connecting reinforcing steel bars are the same in number and correspond to one another, and the connecting reinforcing steel bars are connected between the first reinforcing steel bars and the second reinforcing steel bars.
Preferably, the length of the first reinforcing steel bar is greater than that of the second reinforcing steel bar; when the first steel bar and the second steel bar are spliced, the first steel bar and the second steel bar are not overlapped.
Preferably, a plurality of longitudinal steel bars are further arranged in the top cast-in-place strip, and the longitudinal steel bars are connected with the steel bars.
Preferably, a bottom notch is formed in the butt joint face of the first prefabricated box culvert component and the second prefabricated box culvert component, and a bottom cast-in-place strip is arranged at the bottom notch.
Preferably, the concrete strength of the top cast-in-place strip and the bottom cast-in-place strip is C40-C60.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model relates to a two component assembled box culverts of die block construction are exempted from in cast-in-place area of roof are through the recess structure that the butt joint department formed at first prefabricated box culvert component and the prefabricated box culvert component of second improves the biography power effect in the cast-in-place area in top. First step structure and second step structure can form closed bottom plate after the spelling, compare in set up at the cast-in-place area of roof and hang the mould or set up the support in the box culvert and found the mould, and this structure can reduce the construction complexity for site operation speed is a technical means of connecting two component formula prefabricated box culverts fast and reliably.
The upper and lower layers of reinforcing steel bars formed by the U-shaped reinforcing steel bars can reliably transmit bending moment and axial tension, so that the longitudinal deformation of the structural connection part is coordinated, the U-shaped reinforcing steel bars can be constructed without welding, the fatigue problem of the reinforcing steel bars in a cast-in-place belt is well relieved, the error range of the pre-embedded positions of the reinforcing steel bars can be widened, and the concrete vibration compaction is facilitated.
Drawings
Fig. 1 is a schematic structural view of a two-component assembled box culvert constructed by a top plate cast-in-place belt without a bottom die of the utility model;
FIG. 2 is a front elevation view of splicing a two-component fabricated box culvert constructed by a top plate cast-in-place strip without a bottom die;
FIG. 3 is a vertical view of two assembled box culverts constructed by cast-in-place top plate strips without bottom formwork after splicing;
fig. 4 is a plan view of the spliced two-component assembled box culvert constructed by the cast-in-place top plate strip without a bottom die.
In the figure, 1, a first prefabricated box culvert member; 2. a second prefabricated box culvert member; 3. reinforcing steel bars; 4. longitudinal reinforcing steel bars; 5. casting a belt on the top in situ; 6. casting a belt on the bottom in situ; 7. leakage-proof steel bars; 8. and connecting the reinforcing steel bars.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
The utility model discloses a two component assembled box culvert of die block construction are exempted from in cast-in-place area of roof, refer to fig. 1, first prefabricated box culvert component 1 and the prefabricated box culvert component 2 of second that set up including relative interval, the butt joint face department of first prefabricated box culvert component 1 and the prefabricated box culvert component 2 of second forms the top notch, top notch department is equipped with cast-in-place area die block, refer to fig. 2, 3, cast-in-place area die block includes first step structure, second step structure and leak protection reinforcing bar 7, first step structure is located the butt joint face department of first prefabricated box culvert component 1, second step structure is located the butt joint face department of prefabricated box culvert component 2 of second, first step structure forms V type recess with second step structure, leak protection reinforcing bar 7 is located inside the recess. The thickness of the first step structure is 1/3-1/4 of the thickness of the top plate of the first prefabricated box culvert component 1, and the thickness of the second step structure is 1/3-1/4 of the thickness of the top plate of the second prefabricated box culvert component 2.
Referring to fig. 3 and 4, the bottom die of the cast-in-place strip is used for casting a top cast-in-place strip 5, a plurality of reinforcing steel bars 3 and a plurality of longitudinal reinforcing steel bars 4 which are transversely arranged in a staggered manner are arranged in the top cast-in-place strip 5, and the longitudinal reinforcing steel bars 4 are connected with the reinforcing steel bars 3.
The steel bars 3 comprise a plurality of first steel bars, a plurality of second steel bars and a plurality of connecting steel bars, one ends of the first steel bars are embedded in the top plate of the first prefabricated box culvert member 1, and the other ends of the first steel bars extend out of the top plate of the first prefabricated box culvert member 1; one end of the second steel bar is embedded in the top plate of the second prefabricated box culvert member 2, and the other end of the second steel bar extends out of the top plate of the second prefabricated box culvert member 2; the first reinforcing steel bars, the second reinforcing steel bars and the connecting reinforcing steel bars are the same in number and correspond to one another, and the connecting reinforcing steel bars are connected between the first reinforcing steel bars and the second reinforcing steel bars. Wherein the length of the first rebar is greater than the length of the second rebar; when the first reinforcing steel bar and the second reinforcing steel bar are spliced, the first reinforcing steel bar, the second reinforcing steel bar and the connecting reinforcing steel bar are all U-shaped.
The butt joint surface of the first prefabricated box culvert member 1 and the second prefabricated box culvert member 2 is provided with a bottom notch, and a bottom cast-in-situ belt 6 is arranged at the bottom notch. In this embodiment, the concrete strength of the top cast-in-place strip 5 and the bottom cast-in-place strip 6 is C40 to C60.
The utility model relates to a two component assembled box culvert's of die block construction are exempted from in cast-in-place area of roof concrete construction method as follows:
1) Designing and manufacturing a combined steel template, and prefabricating a reinforcement cage and U-shaped reinforcements;
2) The method comprises the following steps that two prefabricated box culvert standard components, namely a first prefabricated box culvert component 1 and a second prefabricated box culvert component 2, are prefabricated in an industrial mode, U-shaped steel bars are embedded in the prefabricated box culvert standard components respectively, longitudinal steel bars 4 penetrate through the bent parts of the steel bars 3, a first step structure is arranged on the butt joint surface of the first prefabricated box culvert component 1, a second step structure is arranged on the butt joint surface of the second prefabricated box culvert component 2, and the prefabricated box culvert standard components are combined to form a V-shaped groove on the butt joint surface;
3) Transporting the prefabricated box culvert components to an installation site, and performing on-site assembly by adopting a crawler crane;
4) Placing a longitudinal leakage-proof steel bar 7 in a V-shaped groove at the lower end of a step splicing seam of adjacent prefabricated box culvert components, and binding and connecting a longitudinal steel bar 4 with a U-shaped steel bar;
5) And pouring the bottom cast-in-place strip 6 and the top cast-in-place strip 5 to form an integral box culvert top plate, and putting into use after curing according to requirements.
The above-mentioned embodiments are only preferred embodiments of the present invention, and it should be understood by those skilled in the art that the technical solution of the present invention can be modified and replaced easily without departing from the spirit and principle of the present invention, and the modified and replaced embodiments also fall within the protection scope of the appended claims.
Claims (9)
1. The two-component assembled box culvert constructed by the roof cast-in-place belt without the bottom die is characterized by comprising a first prefabricated box culvert component (1) and a second prefabricated box culvert component (2) which are oppositely arranged at intervals, wherein a top notch is formed at the joint surface of the first prefabricated box culvert component (1) and the second prefabricated box culvert component (2), a cast-in-place belt bottom die is arranged at the top notch, the cast-in-place belt bottom die comprises a first step structure, a second step structure and leakage-proof reinforcing steel bars (7), the first step structure is positioned at the joint surface of the first prefabricated box culvert component (1), the second step structure is positioned at the joint surface of the second prefabricated box culvert component (2), the first step structure and the second step structure form a groove, and the leakage-proof reinforcing steel bars (7) are positioned inside the groove; the cast-in-place strip bottom mould is used for pouring a top cast-in-place strip (5), and a plurality of reinforcing steel bars (3) which are transversely arranged in a staggered mode are arranged in the top cast-in-place strip (5).
2. The two-component fabricated box culvert for roof cast-in-place strip bottom-die-free construction according to claim 1, wherein the groove is V-shaped.
3. The two-component fabricated culvert for top plate cast-in-place strip bottom-die-free construction according to claim 1, wherein the thickness of the first step structure is 1/3-1/4 of the thickness of the top plate of the first prefabricated culvert component (1).
4. The two-component fabricated culvert for top plate cast-in-place strip bottom-die-free construction according to claim 1, wherein the thickness of the second step structure is 1/3-1/4 of the thickness of the top plate of the second prefabricated culvert component (2).
5. The two-component fabricated culvert for roof cast-in-place strip bottom-die-free construction according to claim 1, wherein the steel bars (3) comprise a plurality of first steel bars, a plurality of second steel bars and a plurality of connecting steel bars, one end of each first steel bar is embedded in the roof of the first prefabricated culvert component (1), and the other end of each first steel bar extends out of the roof of the first prefabricated culvert component (1); one end of the second steel bar is embedded in the top plate of the second prefabricated box culvert component (2), and the other end of the second steel bar extends out of the top plate of the second prefabricated box culvert component (2); the first reinforcing steel bars, the second reinforcing steel bars and the connecting reinforcing steel bars are the same in number and correspond to one another, and the connecting reinforcing steel bars are connected between the first reinforcing steel bars and the second reinforcing steel bars.
6. The two-component fabricated culvert for roof cast-in-place strip bottom-die-free construction according to claim 5, wherein the length of the first reinforcing steel bar is greater than the length of the second reinforcing steel bar; when the first reinforcing steel bar and the second reinforcing steel bar are spliced, the first reinforcing steel bar and the second reinforcing steel bar are not overlapped.
7. The two-component assembled box culvert for bottom-die-free construction of the cast-in-place top slab strip according to claim 1, wherein a plurality of longitudinal steel bars (4) are further arranged in the cast-in-place top slab strip (5), and the longitudinal steel bars (4) are connected with the steel bars (3).
8. The two-component fabricated box culvert for bottom-die-free construction with the cast-in-place top plate strip according to claim 1, wherein a bottom notch is formed at the butt joint surface of the first prefabricated box culvert component (1) and the second prefabricated box culvert component (2), and a cast-in-place bottom strip (6) is arranged at the bottom notch.
9. The two-component assembled box culvert for top plate cast-in-place strip bottom-die-free construction according to claim 8, wherein the concrete strength of the top cast-in-place strip (5) and the bottom cast-in-place strip (6) is C40-C60.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222494466.4U CN218813244U (en) | 2022-09-20 | 2022-09-20 | Two-component assembled box culvert for top plate cast-in-place belt bottom-die-free construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222494466.4U CN218813244U (en) | 2022-09-20 | 2022-09-20 | Two-component assembled box culvert for top plate cast-in-place belt bottom-die-free construction |
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| Publication Number | Publication Date |
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| CN218813244U true CN218813244U (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222494466.4U Active CN218813244U (en) | 2022-09-20 | 2022-09-20 | Two-component assembled box culvert for top plate cast-in-place belt bottom-die-free construction |
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| CN (1) | CN218813244U (en) |
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